/// <summary>
        /// Initializes a new instance of the <see cref="MapGrhEffectSeekPosition"/> class.
        /// </summary>
        /// <param name="grh">Grh to draw.</param>
        /// <param name="position">Position to draw on the map.</param>
        /// <param name="target">The destination position.</param>
        /// <param name="speed">How fast this object moves towards the target in pixels per second.</param>
        public MapGrhEffectSeekPosition(Grh grh, Vector2 position, Vector2 target, float speed)
            : base(grh, position)
        {
            speed = speed / 1000f;

            _startTime = TickCount.Now;
            _startPosition = position;
            _targetPosition = target;

            // Calculate the angle between the position and target
            var diff = position - target;
            var angle = Math.Atan2(diff.Y, diff.X);

            var cos = Math.Cos(angle);
            var sin = Math.Sin(angle);

            // Multiply the normalized direction vector (the cos and sine values) by the speed to get the velocity
            // to use for each elapsed millisecond
            _velocity = -new Vector2((float)(cos * speed), (float)(sin * speed));

            // Precalculate the amount of time it will take to hit the target. This way, we can check if we have reached
            // the destination simply by checking the current time.
            var dist = Vector2.Distance(position, target);
            var reqTime = (int)Math.Ceiling(dist / speed);

            _endTime = (TickCount)(_startTime + reqTime);
        }

        /// <summary>
        /// When overridden in the derived class, draws the graphics to the control.
        /// </summary>
        /// <param name="currentTime">The current time.</param>
        protected override void HandleDraw(TickCount currentTime)
        {
            base.HandleDraw(currentTime);

            if (DesignMode)
                return;

            if (_drawingManager.RenderWindow == null)
                return;

            if (Grh == null)
                return;

            Grh.Update(currentTime);

            m.Update(currentTime);

            _drawingManager.Update(currentTime);

            var sb = _drawingManager.BeginDrawWorld(_camera);
            if (sb == null)
                return;

            // Change the view
            var oldView = RenderWindow.GetView();
            _drawView.Reset(new FloatRect(Camera.Min.X, Camera.Min.Y, Camera.Size.X, Camera.Size.Y));
            RenderWindow.SetView(_drawView);

            try
            {
                try
                {
                    Grh.Draw(sb, Vector2.Zero, Color.White);
                }
                catch (LoadingFailedException)
                {
                    // A LoadingFailedException is generally fine here since it probably means the graphic file was invalid
                    // or does not exist
                }

                // Draw the walls
                if (Walls != null)
                {
                    foreach (var wall in Walls)
                    {
                        var rect = wall.ToRectangle();
                        RenderRectangle.Draw(sb, rect, _autoWallColor);
                    }
                }

                m.Draw(sb, Camera);
            }
            finally
            {
                _drawingManager.EndDrawWorld();

                // Restore the view
                RenderWindow.SetView(oldView);
            }
        }

        /// <summary>
        /// Updates the <see cref="MapGrh"/>.
        /// </summary>
        /// <param name="currentTime">Current game time.</param>
        public override void Update(TickCount currentTime)
        {
            base.Update(currentTime);

            if (IsAlive)
                UpdateEffect(currentTime);
        }

        /// <summary>
        /// Updates the World.
        /// </summary>
        public virtual void Update()
        {
            // Get the current time
            var currentTime = GetTime();

            // Check if this is the very first update - if so, bring the timer up to date
            if (_isFirstUpdate)
            {
                _lastUpdateTime = currentTime;
                _isFirstUpdate = false;
            }

            // Grab the update rate
            var updateRate = GameData.WorldPhysicsUpdateRate;

            // Check if we fell too far behind
            if (currentTime - _lastUpdateTime > _maxUpdateDeltaTime)
            {
                const string errmsg = "Fell too far behind in updates to catch up. Jumping ahead to current time.";
                if (log.IsWarnEnabled)
                    log.Warn(errmsg);

                // Push the time ahead to a bit before the current time
                _lastUpdateTime = (TickCount)(currentTime - updateRate - 1);
            }

            // Keep updating until there is not enough delta time to fit into the updateRate
            while (currentTime > _lastUpdateTime + updateRate)
            {
                UpdateMaps(updateRate);
                _lastUpdateTime += (uint)updateRate;
            }
        }

 /// <summary>
 /// Gets the time stamp.
 /// </summary>
 /// <param name="currentTime">The time to get the time stamp for.</param>
 /// <returns>The time stamp for the given time.</returns>
 public static ushort GetTimeStamp(TickCount currentTime)
 {
     unchecked
     {
         return (ushort)((currentTime >> 3) % (MaxTimeStampSize + 1));
     }
 }

        /// <summary>
        /// Updates the GUISettings.
        /// </summary>
        /// <param name="currentTime">Current time.</param>
        public void Update(TickCount currentTime)
        {
            if (_lastSaveTime + _saveFrequency > currentTime)
                return;

            _lastSaveTime = currentTime;
            AsyncSave();
        }

        /// <summary>
        /// Updates the server time.
        /// </summary>
        /// <param name="currentTime">The current game time. Used to determine if enough time has elapsed since
        /// the last update.</param>
        public void Update(TickCount currentTime)
        {
            if (currentTime - _lastUpdateTime < UpdateRate)
                return;

            _lastUpdateTime = currentTime;
            _updateQuery.Execute();
        }

 public bool TimeElapsed(TickCount currentTick)
 {
     if (currentTick.Elapsed(storedTime, this.interval)) {
         return true;
     } else {
         return false;
     }
 }

        public ItemEntity(MapEntityIndex mapEntityIndex, Vector2 pos, Vector2 size, GrhIndex graphicIndex, TickCount currentTime)
            : base(pos, size)
        {
            Amount = 0;

            ((IDynamicEntitySetMapEntityIndex)this).SetMapEntityIndex(mapEntityIndex);
            _grh = new Grh(GrhInfo.GetData(graphicIndex), AnimType.Loop, currentTime);
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MapGrh"/> class.
        /// </summary>
        /// <param name="reader">The reader to read the values from.</param>
        /// <param name="currentTime">The current time.</param>
        /// <exception cref="ArgumentNullException"><paramref name="reader" /> is <c>null</c>.</exception>
        public MapGrh(IValueReader reader, TickCount currentTime)
        {
            if (reader == null)
                throw new ArgumentNullException("reader");

            _grh = new Grh(null, AnimType.Loop, currentTime);

            ReadState(reader);
        }

 public MapNpcBase(DataManager.Maps.MapNpc rawNpc)
 {
     this.rawNpc = rawNpc;
     Darkness = -2;
     Mobility = new bool[16];
     TimeMultiplier = 1000;
     AttackTimer = new TickCount(Core.GetTickCount().Tick);
     PauseTimer = new TickCount(Core.GetTickCount().Tick);
 }

 public void OnTimeElapsed(TickCount currentTick)
 {
     storedTime = currentTick;
     return;
     PMU.Sockets.IPacket packet = PMU.Sockets.TcpPacket.CreatePacket("keepalive");
     foreach (Network.Client client in Network.ClientManager.GetAllClients()) {
         Network.Messenger.SendDataTo(client, packet);
     }
 }

        /// <summary>
        /// When overridden in the derived class, performs the additional updating that this <see cref="MapGrhEffect"/>
        /// needs to do such as checking if it is time to kill the effect. This method should be overridden instead of
        /// <see cref="MapGrh.Update"/>. This method will not be called after the effect has been killed.
        /// </summary>
        /// <param name="currentTime">Current game time.</param>
        protected override void UpdateEffect(TickCount currentTime)
        {
            if (_terminateWhenDoneLooping && Grh.AnimType == AnimType.None)
            {
                Kill(true);
                return;
            }

            if (TickCount.Now >= _expireTime)
                Kill(true);
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="IPSocket"/> class.
        /// </summary>
        /// <param name="conn">The <see cref="NetConnection"/> that this <see cref="IPSocket"/> is for.</param>
        IPSocket(NetConnection conn)
        {
            _timeCreated = TickCount.Now;

            _conn = conn;

            var addressBytes = _conn.RemoteEndPoint.Address.GetAddressBytes();
            _address = IPAddressHelper.IPv4AddressToUInt(addressBytes, 0);

            _addressStr = IPAddressHelper.ToIPv4Address(_address) + ":" + _conn.RemoteEndPoint.Port;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="GrhDataUpdaterProgressForm"/> class.
        /// </summary>
        /// <param name="total">The total number of items.</param>
        public GrhDataUpdaterProgressForm(int total)
        {
            InitializeComponent();

            _total = total;
            _startTime = TickCount.Now;

            progBar.Minimum = 0;
            progBar.Maximum = total;
            progBar.Value = 0;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MapGrhEffectLoopOnce"/> class.
        /// </summary>
        /// <param name="grh">Grh to draw.</param>
        /// <param name="position">Position to draw on the map.</param>
        /// <param name="target">The <see cref="ISpatial"/> to seek out.</param>
        /// <param name="speed">How fast this object moves towards the target in pixels per second.</param>
        /// <exception cref="ArgumentNullException"><paramref name="target"/> is null.</exception>
        public MapGrhEffectSeekSpatial(Grh grh, Vector2 position, ISpatial target, float speed)
            : base(grh, position)
        {
            if (target == null)
                throw new ArgumentNullException("target");

            _lastUpdate = TickCount.Now;

            _target = target;
            _speed = speed / 1000f;
        }

        /// <summary>
        /// Starts the display of a skill being casted.
        /// </summary>
        /// <param name="skillType">Type of the skill.</param>
        /// <param name="castTime">The time it will take for the skill to be casted.</param>
        public void StartCasting(SkillType skillType, TickCount castTime)
        {
            _currentCastTime = castTime;
            _castStartTime = TickCount.Now;
            _skillType = skillType;

            Text = "Casting " + skillType;

            var textSize = Font.MeasureString(Text);
            _textOffset = (Size / 2f) - (textSize / 2f);

            IsVisible = true;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ChatBubble"/> class.
        /// </summary>
        /// <param name="parent">The parent <see cref="Control"/>.</param>
        /// <param name="owner">The <see cref="Entity"/> that this <see cref="ChatBubble"/> is for.</param>
        /// <param name="text">The text to display.</param>
        /// <exception cref="ArgumentNullException"><paramref name="owner" /> is <c>null</c>.</exception>
        /// <exception cref="ArgumentNullException"><paramref name="text" /> is <c>null</c>.</exception>
        public ChatBubble(Control parent, Entity owner, string text) : base(parent, Vector2.Zero, Vector2.Zero)
        {
            if (owner == null)
                throw new ArgumentNullException("owner");
            if (string.IsNullOrEmpty(text))
                throw new ArgumentNullException("text");

            _owner = owner;
            _deathTime = (TickCount)(TickCount.Now + Lifespan);
            _textControl = new ChatBubbleText(this, text) { Font = Font };

            _owner.Disposed += ChatBubble_Owner_Disposed;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MapGrh"/> class.
        /// </summary>
        /// <param name="reader">The reader to read the values from.</param>
        /// <param name="currentTime">The current time.</param>
        /// <exception cref="ArgumentNullException"><paramref name="reader" /> is <c>null</c>.</exception>
        public MapGrh(IValueReader reader, TickCount currentTime)
        {
            if (reader == null)
                throw new ArgumentNullException("reader");

            _grh = new Grh(null, AnimType.Loop, currentTime);

            ReadState(reader);

            // Set the initial size value
            var grhSize = Grh.Size;
            Vector2.Multiply(ref _scale, ref grhSize, out _scaledGrhSizeCache);
        }

        /// <summary>
        /// Starts the display of a skill being casted.
        /// </summary>
        /// <param name="skillType">Type of the skill.</param>
        /// <param name="castTime">The time it will take for the skill to be casted.</param>
        public void StartCasting(SkillType skillType, TickCount castTime)
        {
            _currentCastTime = castTime;
            _castStartTime = TickCount.Now;
            _skillType = skillType;

            Text = GameMessageCollection.CurrentLanguage.GetMessage(GameMessage.CombatCastingBegin, skillType.ToString());

            var textSize = Font.MeasureString(Text);
            _textOffset = (Size / 2f) - (textSize / 2f);

            IsVisible = true;
        }